†family Helicotomidae Wenz 1938 (snail)

Gastropoda - Euomphalina - Helicotomidae

Alternative spelling: Helicotominae

Full reference: W. Wenz. 1938. Handbuch der Paläozoologie; Gastropoda. Handbuch der Paläozoologie 1-240

Parent taxon: Euomphaloidea according to P. Bouchet et al. 2005

See also Golikov and Starobogatov 1975, Jeffery 2003, Knight et al. 1960, Kosnik 2002, Morris and Cleevely 1981 and Wagner 1999

Sister taxa: Anomphalidae, Elasmonematidae, Euomphalidae, Holopeidae, Kitikamispira, Lesueurillidae, Microdomatidae, Neoplatyteichum, Nettersheimia, Omphalocirridae, Omphalocirrinae, Omphalotrochidae, Ornollus, Planitrochidae, Pseudophoridae, Pycnomphalidae, Rhenomphalus, Serpulospira, Tychobraheidae

Subtaxa: Amphelissa Boucotspira Boucotspira Helicotoma Lophonema Ophiletina Palaeomphalus Paraviviana Walcottoma Yochelsoniella

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Ecology: stationary epifaunal suspension feeder

Distribution:

• Jurassic of Hungary (1 collection)

• Devonian of Australia (2)

• Silurian of Sweden (4)

• Ordovician of Australia (4), Canada (21: British Columbia, Nunavut, Ontario, Quebec), China (3), the Czech Republic (1), Estonia (5), Greenland (2), Malaysia (1), North Korea (1), Norway (3), South Korea (1), Sweden (3), the United Kingdom (6), United States (84: Alaska, California, Colorado, Georgia, Illinois, Illinois, Iowa, Indiana, Kentucky, Michigan, Minnesota, Missouri, Nevada, Ohio, Oklahoma, Tennessee, Texas, Virginia, Wisconsin)

• Chazy of Canada (1: Quebec)

• Llandeilo of China (1), United States (1: California)

• Whiterockian of United States (6: Nevada, Virginia)

• Cassinian of Canada (4: Newfoundland and Labrador, Quebec), Greenland (1), United States (38: Missouri, Vermont)

• Arenigian of United States (1: Virginia)

• Arenig of Greenland (4)

Total: 199 collections including 292 occurrences

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